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定语从句 （Attributive Clauses） 定语从句（Attributive Clauses）在句中做定语，修饰一个名词或代词，被修饰的名词、词组或代词即为先行词。定语从句通常出现在先行词之后，由关系词（关系代词或关系副词）引出。 关系词连接主句和从句,同时本身又在从句中充当某一成分,如主语、宾语、定语或状语 关系代词有：who, whom, whose, that, which等。 关系副词有：when, where, why等。 限制性和非限制性定语从句 关系词在从句中充当不同成分 The flowers which I ordered from the store will arrive soon. （宾语） The man who telephoned me just now is a writer. （主语） The man whose left leg was lost in the war is a hero now. （定语） 关系代词引导的定语从句 关系代词所代替的先行词是人或物的名词或代词，并在从句中充当主语、宾语、定语等成分。关系代词在定语从句中作主语时，从句谓语动词的人称和数要和先行词保持一致。 who, whom, that whose which, that who whom that 这些词代替的先行词是人的名词或代词，在从句中所起作用如下： eg: Is he the man who/that wants to see you? （who/that在从句中作主语） He is the man whom/ that I saw yesterday. （whom/that在从句中作宾语） which that 它们所代替的先行词是事物的名词或代词，在从句中可作主语、宾语等 eg: A tiger which / that had escaped from the zoo is now at large. （which / that在从句中作主语） The bag which / that I am carrying is too heavy. (which / that在从句中作宾语) 关系代词做介词宾语 在限制性定语从句中如果介词置于句末,关系代词仍可以用who, whom, which或that；介词前提，关系代词只能用which or whom eg: This is the house which/that Lu Xun lived in. This is the house in which Lu Xun lived. 如果定语从句中谓语动词为介词动词(固定搭配), 那么介词必须后置, 不能与动词拆开置于关系代词前面 eg: This is the pen which/that I am looking for. 常用that作关系代词的几种情况 先行词为序数词、数词、形容词最高级时，只用that: eg: This is the best film that has ever been made. The first place (that) we visited was the Great Wall. 先行词有the only, the very修饰时，只用that : eg: The only thing (that) he had in the room was a bed. 在不定代词，如： all, anything, nothing, the one, much, few, any, little等作先行词时，只用that，不用which: eg: This is all (that) I want to say. Is there anything (that) I can do for you? 先行词为人和物的名词词组: eg: They talked of persons and things that they remembered in the school. 关系副词引导的定语从句 关系副词可代替的先行词是时间、地点或理由的名词，在从句中作状语。 when, where, why when where why 关系副词when, where, why的含义相当于 “介词+ which”结构，因此常常和“介词+ which”结构交替使用 Do you remember the day when/ yo